一、沼气如何发电

　　How does biogas generate electricity?

　　1、沼气脱硫及稳压、防爆设备：供发起机运用的沼气要先通过脱硫设备，以削减硫化氢对发起机的腐蚀。

　　Biogas desulfurization, voltage stabilization and explosion-proof equipment: The biogas for engine use must first pass through the desulfurization equipment to reduce the corrosion of hydrogen sulfide on the engine.

　　2、进气调理体系：在进气总管上，需设置一套准确、活络的燃气混合器，以调理空气和沼气的混合份额。

　　2. Intake conditioning system: On the intake manifold, a set of accurate and sensitive gas mixer needs to be installed to adjust the mixing ratio of air and biogas.

　　3、发起机焚烧体系：沼气的焚烧速度慢，关于本来运用汽油、柴油已及天然气的发起机的焚烧体系要进行必定程度的改造，以进步焚烧功率，削减后焚烧表象，延伸工作寿数。

　　3. Engine combustion system: The combustion speed of biogas is slow. The combustion system of engines that originally used gasoline, diesel and natural gas needs to be reformed to a certain extent to improve combustion efficiency, reduce post-combustion phenomena and extend service life.

　　4、调速体系：若沼气发电机组独立工作，即以用电设备为负荷进行工作，用电设备的并入和卸载都会使发电机的负荷发生动摇。为了保证发电机组正常工作，沼气发起机上的调速体系必不可少。

　　4. Speed regulation system: If the biogas generator set works independently, that is, it works with electrical equipment as the load. The parallel connection and unloading of electrical equipment will cause fluctuations in the load of the generator. In order to ensure the normal operation of the generator set, the speed regulation system on the biogas engine is essential.

　　5、预热运用体系：选用预热运用设备，对发起机冷却水和排气中的热量进行运用，进步沼气的动力运用功率。

　　5. Preheating and utilization system: Select preheating and utilization equipment to utilize the heat in the engine cooling water and exhaust to improve the power utilization efficiency of biogas.

　　6、并网控制体系：首要包含发电机调压电路，主动准同期并排控制电路，手动并排宽和列控制电路，丈量电路，燃气发起机及辅佐设备控制电路等。

　　6. Grid-connected control system: mainly includes generator voltage regulation circuit, automatic quasi-synchronous parallel control circuit, manual parallel on and off control circuit, measurement circuit, gas engine and auxiliary equipment control circuit, etc.

　　二、沼气发电的优势

　　Advantages of biogas power generation

　　1、原料来源广泛

　　Wide range of raw material sources

　　沼气的主要燃烧成分是甲烷，由产甲烷菌厌氧消化有机物产生。所以只要有机物存在的地方，再配以适合的环境条件，就会有甲烷的生成。例如人畜的粪便、有机工业废水、垃圾填埋场、农作物秸秆等都可用做沼气产生的原材料。

　　The main combustion component of biogas is methane, which is produced by the anaerobic digestion of organic matter by methanogens. So as long as there is organic matter and suitable environmental conditions, methane will be generated. For example, human and animal manure, organic industrial wastewater, landfills, crop straws, etc. can all be used as raw materials for biogas production.

　　2、沼气为可再生能源

　　2. Biogas is a renewable energy source

　　用沼气进行发电，不用担心会有枯竭的一天。

　　Using biogas for power generation, there is no need to worry about running out one day.

　　3、沼气发电清洁，污染少

　　3. Biogas power generation is clean and causes less pollution

　　沼气中含有少量的硫化物，经气体预处理后硫化物的含量已经降到很低的浓度，基本上不会对环境造成影响。

　　Biogas contains a small amount of sulfide. After gas pretreatment, the content of sulfide has been reduced to a very low concentration and basically will not have an impact on the environment.

　　4、沼气发电建设规模小，工期短

　　4. Biogas power generation has a small construction scale and a short construction period

　　建立小型的沼气发电站可以在几周或几月内实现，并且可根据需求的发展随时增加和扩建，有利于资金的回收与周转。

　　A small biogas power station can be established within a few weeks or months, and it can be expanded and added at any time according to the development of demand, which is conducive to the recovery and turnover of funds.

　　三、沼气发电机组优缺点

　　Advantages and disadvantages of biogas generator sets

　　其实沼气发电机组分为两种，一种是全部使用沼气的单燃料沼气发电机组，另一种是部分使用沼气的双燃料沼气 - 柴油发电机组。

　　In fact, biogas generator sets are divided into two types. One is a single-fuel biogas generator set that uses all biogas, and the other is a dual-fuel biogas-diesel generator set that uses part of biogas.

　　单燃料沼气发电机组工作原理：将 “空气沼气” 的混合物在气缸内压缩，用火花塞使其燃烧，通过活塞的往复运动得到动力，然后连接发电机发电。它具备如下优点：

　　Working principle of single-fuel biogas generator set: Compress the mixture of "air and biogas" in the cylinder, use a spark plug to make it burn, obtain power through the reciprocating motion of the piston, and then connect the generator to generate electricity. It has the following advantages:

　　1、不需要辅助燃料油及其供给设备

　　No need for auxiliary fuel oil and its supply equipment.

　　2、燃料为一个系统，在控制方面比可烧两种燃料的发电机组简单

　　The fuel is a system, and it is simpler in control than a generator set that can burn two kinds of fuels.

　　3、发电机组价格较低

　　The price of the generator set is lower.

　　双燃料沼气 - 柴油发电机组工作原理：将 “空气燃烧气体” 的混合物在气缸内压缩，用点火燃料使其燃烧，通过活塞的往复运动得到动力，然后连接发电机发电。它具备如下优点：

　　Working principle of dual-fuel biogas-diesel generator set: Compress the mixture of "air and combustion gas" in the cylinder, use ignition fuel to make it burn, obtain power through the reciprocating motion of the piston, and then connect the generator to generate electricity. It has the following advantages:

　　1、用液体燃料或气体燃料都可工作

　　It can work with either liquid fuel or gas fuel.

　　2、对沼气的产量和甲烷浓度的变化能够适应

　　It can adapt to changes in biogas production and methane concentration.

　　3、如由用气体燃料转为用柴油燃料在停止工作，发电机组内不残留未燃烧的气体，因为饿耐腐蚀性好。

　　If the gas fuel is changed to diesel fuel and the operation is stopped, there will be no unburned gas remaining in the generator set because of its good corrosion resistance.